Disposable street sweeper gutter broom



Feb. 27, 1968 s. TAMNY ETAL 3,370,312

- DISPOSABLE STREET SWEEPER GUTTER BROOM I Filed April 11, 1966 2 Sheets-Sheet 1 Alva/rags. SIMON TZMNY ROBERT E. BROWN mm: /QW

Feb. 27, 1968 s. TAMNY ETAL DISPOSABLE STREET SWEEPER GUTTER BROOM Filed April 11, 1966 2 Sheets-Sheet 2 k v m m E W N W EM? 0 2M w m I 3 M m M 5 M. b 0,. R Du m mm v @w w w i 3 a p 2 M 2-.

United States Patent 3,370,312 DISPOSABLE STREET SWEEPER GUTTER BROQM Simon Tamny, Los Augeles, and Robert E. Brown, Claremont, Calif., assiguors to Wayne Manufacturing Company, Pomona, Calif., a corporation of California Filed Apr. 11, 1966, Ser. No. 541,633 6 Claims. (Cl. 15180) ABSTRACT OF THE DISCLOSURE The invention contemplates a disposable street sweeper gutter broom construction employing the general combination of an upper bristle retainer plate, an engaging first bristle supporting plate in the form of a sheet metal stamping having outwardly directed apertures to receive bristles held between the stamping and retainer plate, and a second and lower plate secured to the first plate in spaced relation and having apertures which pass and laterally support the bristles.

This invention relates to street sweeper rotary gutter brooms and to novel features which render practicably desirable and economical disposability of preformed brush units when their bristles have become worn.

Such brooms are of circular configuration and operate in essentially vertical though variable axial position. As in conventional gutter broom assemblies, the replaceable unit with which the invention is concerned is calried by and below a head or support which is power driven from the sweeper machine.

The invention has for its general object to provide an economical and simply replaceable prefabricated brush unit which contains and retains the bristles in demountable relation to the driving head.

Particularly contemplated is a disposable unit capable of fabrication 'by low cost parts and assemblage requirements, including the use of stampings to retain and support the bristles at downward and outward inclination, and an associated closure that assures proper maintenance of the bristles throughout their usefulness.

In its preferred form the disposable unit includes at least one annular plate having deflected and apertured configurations which direct and support the bristles extending from locked-in retention between this plate and an overlying keeper plate. Associated with the apertured plate may be a similar lower plate also apertured to pass and laterally support the bristles.

Without further preliminary detail, the invention will be described in reference to an illustrative embodiment shown by the accompanying drawing, in which:

FIG. 1 is a partly broken away plan view of a mounted gutter broom;

FIG. 2 is a cross section taken on line 2-2 of FIG. 1;

FIG. 3 is a fragmentary enlarged showing of the underside of the bristle mounting plates, with showing of the bristles omitted and viewed from line 33 of FIG. 2; and

FIGS. 4 and 5 are enlarged fragmentary sections respectively on lines 44 and 5-5 of FIG. 3.

The demountable and disposable gutter broom structure generally indicated at is shown to be carried by and to depend from a suitable head typified by the circular plate 11 connected to or otherwise associated with a generally vertical drive shaft 12. Welded to the underside of the head 11 is a brush retaining means which may have the form of a concentric ring 13 or circular series of ring segments, deflected at 14 to form a keeper space 15,

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the metal being further deflected to form a downwardly and outwardly angled flange 16.

The brush proper comprises a plurality, typically four, of arcuate segment assemblies 17 each comprising a correspondingly arcuate plate 18 and integrally joined deflected plates 19 and 20. Between its inner and outer flat flanges 19a and 1%, plate 19 is locally deflected at circularly uniform spacings, to form radially outer recesses 21 defined :by downwardly and inwardly angular extents 22 and reverse sloping extents 23 and 24. The portion 22 is centrally apertured at 25 by outwardly necked deflection of the metal at 26, thus to present a downwardly and outwardly axially directed flange opening at an angle of about 30 degrees from the vertical. Continuing inwardly from portion 24, the metal is deflected at 27 to neck or flange about opening 28, the axial angularity of which corresponds to that of opening 25. Inwardly from the opening the metal is deflected at 29 to the flange 19a below space 30.

The openings 25 and 28 receive the inner doubled ends 31 of the bristle tufts '32 which are angularly oriented in keeping with the openings and are held in place by wires or strips 33 terminally secured to the plate 19. The sizes of the openings and bristle tufts are so related that the necked deflections 26 and 27 of the metal give lateral support to the bristles near their bases.

It is desirable that the bristle tufts be given additional lateral support below their mountings to plate 19, for which purposes welded-on plate 20 is provided and given the illustrated configurations definitive of spaces at 35 and 36 and the bristle passing openings 37 and 38 which are axially alined with openings 25 and 28 and are defined by the annularly necked metal at 39 and 40 to laterally support the bristles in straight alinement with the deflected metal at 26 and 27.

The unitized segments 17 thus consisting of the plates 18, 19, 20 and the mounted bristle tufts 32 are inwardly retained to the head 11 by reception of the inner edge of plate 18 and flange 19a Within recess 15 above the keeper 14. Outwardly the assemblage is held to the head as by bolts 42 inserted through the angular head upset 43 and through opening 44, 45 and 46 respectively within plates 18, 19 and 20. Plate 19 is locally deflected at 48 and 49 to bear flatly against extents 50 and 51 of plate 20, and the latter is deflected at 52 to parallel 47, thus presenting the openings 45 and 46 in an angular alinement that may correspond to the bristle tuft angularity.

In reference to FIG. 5, the upper turned ends 31 of the bristles are engageable against the underside of plate 18 to block upward displacement of the tufts, and as explained, the wires 33 retain the bristles against downward displacement. Thus plate 18 serves the dual functions of a bristle keeper and, with the underlying flange 19a as an inner accommodation within space 15 for the integrated welded assembly.

Plates 18, 19 and 20, as described, may be formed economically as sheet metal stampings, which together with the simplicity of the bristle accommodation, justifies disposal of the segments 17 when the bristles have become worn, and substitution by similar replacement segments.

We claim:

1. A gutter broom comprising a keeper plate to be generally horizontally disposed in the use position of the broom, an arcuate metallic bristle support secured to the underside of said plate and deflected therefrom to provide bristle receiving spaces and to form an arcuate series of apertures directed radially outwardly of the support, bristles having doubled ends within said spaces and projecting radially outwardly through said apertures, a wire extending within and through said doubled ends of the bristles so that both the wire and keeper plate retain the 3 bristles within said spaces, and a second arcuate support attached to the first mentioned support and having outwardly directed bristle passing apertures alined with the first mentioned apertures and within which the bristles are laterally supported.

2. A gutter broom according to claim 1, in which said supports are metal stampings.

3. A gutter broom according to claim 2, in which the stampings have outwardly deflected necks about their bristle passing apertures.

4. A gutter broom according to claim 2, in which said supports are locally deflected to form spaces above their apertures and to form generally parallel outwardly inclined portions containing the apertures.

5. A gutter broom according to claim 1, including also a mounting plate, and means securing said keeper plate and supports to the mounting plate.

6. A gutter broom according to claim 5, in which said References Cited UNITED STATES PATENTS 1,557,166 10/1925 Horn 15180 X 1,892,926 1/1933 Bilde 15-180 2,853,729 9/1958 Link 15-180 3,074,094 8/ 1964 Lechene 15-180 3,142,854 8/1964 Nielsen 15-180 3,163,031 12/1964 Kestell. 3,228,053 1/1966 Horton et al. 15-183 FOREIGN PATENTS 861,958 3/1961 Great Britain.

CHARLES A. WILLMUTH, Primary Examiner.

P. FELDMAN, Assistant Examiner. 

